Suspension Control System Inoperative

SUSPENSION CONTROL SYSTEM INOPERATIVE


Description

The suspension control system does not activate. It does not raise or lower the vehicle in response to ride height changes.




SUSPENSION CONTROL SYSTEM INOPERATIVE


Diagnosis Procedure

1.SUSPENSION CONTROL UNIT POWER AND GROUND INSPECTION
Check the suspension control unit power and ground supply. Suspension Control Unit.
Does the suspension control unit power and ground pass inspection?
YES - GO TO 2.
NO - Repair or replace the malfunctioning part.
2.CHECK HEIGHT SENSOR SIGNAL INPUT
CONSULT-III DATA MONITOR
1. Turn ignition switch ON.
2. Select "HEIGT SEN" of AIR LEVELIZER data monitor item.
3. Check the monitor status.

HEIGT SEN : 0.2V - 4.8V

Is the height sensor voltage normal?
YES - GO TO 3.
NO - Check height sensor signal circuit. Diagnosis Procedure .
3.CHECK GENERATOR "L" CIRCUIT SIGNAL
CONSULT-III DATA MONITOR
1. Start the engine.
2. Select "ACG L" of AIR LEVELIZER data monitor item.
3. Check the monitor status.

ACG L
: OFF with charge light OFF
: ON with charge light ON

Is the generator "L" signal operating normally?
YES - GO TO 4.
NO - Check generator L circuit. L Terminal Circuit.
4.SUSPENSION AIR COMPRESSOR POWER AND GROUND INSPECTION
Check the suspension air compressor power and ground supply. Suspension Air Compressor.
Does the suspension air compressor power and ground pass inspection?
YES - System is operating normally.
NO - Repair or replace the malfunctioning part.